<template>
    <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

     <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon :closable="false">
      </el-alert>
      <!-- 步骤区域 -->
      <el-steps :space="200" :active="activeindex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

       <!-- tab栏区域 -->
       <el-form :model="addform" :rules="addformrules" ref="addformref" label-position="top" label-width="100px">
      <el-tabs :tab-position="'left'" v-model="activeindex" @tab-click="tabclicked" :before-leave="beforetableave">
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addform.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addform.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addform.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addform.goods_number" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
          <el-cascader
              expandTrigger= "hover"
              v-model="addform.goods_cat"
              :options="catelist"
              :props="cateprops"
              @change="handleChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <!-- 渲染表单得item项 -->
          <el-form-item :label="item.attr_name" v-for="item in manytabledata" :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlytabdata" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
            <!-- action图片上传得后台api地址 -->
          <el-upload
            :action="uploadurl"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture" :headers="headerobj" :on-success="handsuccess">
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <!-- 富文本编辑器组件 -->
          <quill-editor v-model="addform.goods_introduce"></quill-editor>
          <!-- 添加商品的按钮 -->
          <el-button type="primary" class="buttonadd" @click="add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="preViewvisible"
      width="50%">
      <img :src="preViewpath" alt="" class="previewimg">
    </el-dialog>
    </div>
</template>

<script>
// import _ from 'lodash'

export default {
  data () {
    return {
      activeindex: '0',
      // 添加商品得表单数据
      addform: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品数所得分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: []
      },
      addformrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      cateprops: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manytabledata: [],
      // 静态属性数据
      onlytabdata: [],
      // 上传得url地址
      uploadurl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件header请求对象
      headerobj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      preViewpath: '',
      preViewvisible: false
    }
  },
  created () {
    this.getcatelist()
  },
  methods: {
    // 获取所有商品信息
    async getcatelist () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品信息失败')
      }
      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化会触发这个函数
    handleChange () {
      if (this.addform.goods_cat.length !== 3) {
        this.addform.goods_cat = []
      }
    },
    beforetableave (actname, oldactname) {
      if (oldactname === '0' && this.addform.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabclicked () {
      //  证明访问的是动态参数面板
      if (this.activeindex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateid}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        // this.$message.success('获取动态参数列表成功')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split('')
        })
        this.manytabledata = res.data
      } else if (this.activeindex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateid}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }
        this.onlytabdata = res.data
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      this.preViewpath = file.response.data.url
      this.preViewvisible = true
    },
    // 处理一处图片的操作
    handleRemove (file) {
      // 获取要删除的图片临时路径
      const filepath = file.response.data.tmp_path
      // 从pics数组中找到对应的索引值
      const i = this.addform.pics.findIndex(x => x.pic === filepath)
      // 调用数组的splice方法 把图片信息对象从pics数组中删除
      this.addform.pics.splice(i, 1)
      // console.log(this.addform)
    },
    // 监听图片上传成功的事件
    handsuccess (response) {
      // 拼接的到一个图片信息对象
      const picinfo = { pic: response.data.tmp_path }
      // 将图片信息对象push到数组中
      this.addform.pics.push(picinfo)
      // console.log(this.addform)
    },
    add () {
      this.$refs.addformref.validate(valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // lodash clonedeep(obj)
        // const form = _.cloneDeep(this.addform)
        // form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        // this.manytabledata.forEach(item => {
        //   const newinfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
        //   this.addform.attrs.push(newinfo)
        // })
        // // 处理静态属性
        // this.onlytabledata.forEach(item => {
        //   const newinfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
        //   this.addform.attrs.push(newinfo)
        // })
        // form.attrs = this.addform.attrs

        // const { data: res } = await this.$http.post('goods', form)
        // if (res.meta.status !== 201) {
        //   return this.$message.error('添加商品失败')
        // }
        // this.$message.success('添加商品成功')
        // this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateid () {
      if (this.addform.goods_cat.length === 3) {
        return this.addform.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewimg {
  width: 100%
}
.buttonadd {
  margin-top: 15px;
}
</style>
